#include <algorithm>
#include <iostream>
#include <vector>

using namespace std;
int main() {
  int n, k;
  cin >> n >> k;
  vector<int> a(n);
  for (int i = 0; i < n; ++i)
    cin >> a[i];
  sort(a.begin(), a.end());
  int ans = 0;
  for (int i = 0; i < k; ++i)
    ans += a[i];
  cout << ans;
}
